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                乌鸦喝水                </h1>
                <p>时间限制：20s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><div><span style="font-size: medium">【题目背景】</span></div>
<div><span style="font-size: medium">&nbsp;&nbsp;&nbsp; 一只乌鸦在自娱自乐，它在面前放了n个有魔力的水缸，水缸里装有无限的水。</span></div>
<div><span style="font-size: medium">【题目描述】</span></div>
<div><span style="font-size: medium">&nbsp;&nbsp;&nbsp; 他准备从第1个水缸飞到第n个水缸，共m次。在飞过一个水缸的过程中，如果他能够得着水缸里的水，即水缸口到水面距离<b>小于等于</b>乌鸦能够得着的深度，那它就会喝水缸里的水。每喝一次水，<b>所有</b>水缸里的水位都会下降，第i个水缸里的水位会下降Ai，注意喝水是瞬间的，如果乌鸦刚好够得着，但喝完之后够不着，也视为喝到一次，水位也会相应的下降。</span></div></p><hr/><h3>输入格式</h3><p><div style="text-indent: 21pt"><span style="font-size: medium">共有3行。第一行有三个正整数n、m和x，用空格隔开。n表示水缸的数量，m表示乌鸦飞的次数，x表示乌鸦能够得着的深度。第二行，有n个用空格隔开的正整数，第i个数为第i个水缸中水缸口到水面的距离Wi。第三行，有n个用空格隔开的正整数，第i个为Ai。</span></div></p><hr/><h3>输出格式</h3><p><div style="text-indent: 21.75pt"><span style="font-size: medium">只有一行，这一行只有一个正整数，为这只乌鸦能喝到水的次数。</span></div></p><hr/><h3>样例输入</h3><pre>5 2 20
15 14 13 12 12
1 1 1 1 1
</pre><hr/><h3>样例输出</h3><pre>9
【数据范围】
100%的数据，0＜n≤100000，0＜m≤100000，0＜x≤2000000000，0＜Wi≤2000000000，0＜Ai≤200。
</pre><hr/><h3>提示</h3><p><p>&nbsp;2016.7.8重设时限，未重测！</p></p><hr/><h3>题目来源</h3><p>By lll6924 at “酱油杯noi考后欢乐赛”</p>
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